Fig. 11. Schematic distribution of actin isoforms in the Paramecium cell, as outlined in Table 1. The trafficking scheme is based on published reviews (Fok and Allen, 1990; Allen and Fok, 2000; Plattner and Kissmehl, 2003). Actin distribution is based mainly on the present data obtained with GFP localization in vivo and with antibody labeling, but also takes into account data from previous work (Tiggemann and Plattner, 1981; Kersken et al., 1986a; Kersken et al., 1986b; Kissmehl et al., 2004). The scheme contains elements of the osmoregulatory system (a, ampula; cv, contractile vacuole; ds, decorated spongiome; ss, smooth spongiome), though consistently unlabeled, of the phagosomal apparatus (as, acidosomes; cf, cytopharyngal fibers; cp, cytoproct; ci, cilia) dv, discoidal vesicles and other recycling vesicles, rv; ee, early endosome; er, endoplasmatic reticulum; fv, food vacuole; ga, golgi apparatus; gh, ghosts (from released trichocysts); oc, oral cavity; pm, plasma membrane; pof, post oral fibers; ps, parasomal sacs; tr, trichocysts; gray background, cytosolic.